I have a 29 gallon tank that's a mixed reef. In it are montipora digitata, 3 types of montipora capricornus, porites, hystrix (bird's nest), hydnophora and pavona under 130 watts of 50/50 compact fluorescent lighting. All of the corals are nicely colored, have encrusted the rocks and grown multiple branches/plates. I'm sure growth is slower than if I had a 150 watt MH, but I'm happy with what I've got for now and dont have to worry about heat issues. I would NOT add acros to the tank except for the bali green slimer or possibly deepwater acros.